<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <title>图片上传-www.bcty365.com</title>
    <script type="text/javascript" src="__ROOT__/Apps/WebApp/View/default/js/jquery-1.7.2.min.js"></script>
    <!-- <script type="text/javascript" src="js/uploadImage.js" ></script>  -->
        <script type="text/javascript" src="__ROOT__/Apps/WebApp/View/default/js/exif.js" ></script>
    <script>

    </script>
</head>
<body>
    <div style="height: 50px; line-height: 50px;text-align: center;border-bottom: 1px solid #171E28;">
            上传图片:
            <input type="file" accept="image/*" id="uploadImage" capture="camera" onchange="selectFileImage(this);" />
        </div>
        <div style="margin-top: 10px;">
            <img alt="preview" src="" id="myImage"/>
        </div>
</body>
<script type="text/javascript">
function selectFileImage(fileObj) {
    var file = fileObj.files['0'];
    //图片方向角 added by lzk
    var Orientation = null;

    if (file) {
        console.log("正在上传,请稍后...");
        var rFilter = /^(image\/jpeg|image\/png)$/i; // 检查图片格式
        if (!rFilter.test(file.type)) {
            //showMyTips("请选择jpeg、png格式的图片", false);
            return;
        }
        // var URL = URL || webkitURL;
        //获取照片方向角属性，用户旋转控制
        EXIF.getData(file, function() {
           // alert(EXIF.pretty(this));
            EXIF.getAllTags(this);
            //alert(EXIF.getTag(this, 'Orientation'));
            Orientation = EXIF.getTag(this, 'Orientation');
            //return;
        });

        var oReader = new FileReader();
        oReader.onload = function(e) {
            //var blob = URL.createObjectURL(file);
            //_compress(blob, file, basePath);
            var image = new Image();
            image.src = e.target.result;
            image.onload = function() {
                var expectWidth = this.naturalWidth;
                var expectHeight = this.naturalHeight;

                if (this.naturalWidth > this.naturalHeight && this.naturalWidth > 800) {
                    expectWidth = 800;
                    expectHeight = expectWidth * this.naturalHeight / this.naturalWidth;
                } else if (this.naturalHeight > this.naturalWidth && this.naturalHeight > 1200) {
                    expectHeight = 1200;
                    expectWidth = expectHeight * this.naturalWidth / this.naturalHeight;
                }
                var canvas = document.createElement("canvas");
                var ctx = canvas.getContext("2d");
                canvas.width = expectWidth;
                canvas.height = expectHeight;
                ctx.drawImage(this, 0, 0, expectWidth, expectHeight);
                var base64 = null;
                //修复ios
                if (navigator.userAgent.match(/iphone/i)) {
                    console.log('iphone');
                    //alert(expectWidth + ',' + expectHeight);
                    //如果方向角不为1，都需要进行旋转 added by lzk
                    if(Orientation != "" && Orientation != 1){
                        alert('旋转处理');
                        switch(Orientation){
                            case 6://需要顺时针（向左）90度旋转
                                alert('需要顺时针（向左）90度旋转');
                                rotateImg(this,'left',canvas);
                                break;
                            case 8://需要逆时针（向右）90度旋转
                                alert('需要顺时针（向右）90度旋转');
                                rotateImg(this,'right',canvas);
                                break;
                            case 3://需要180度旋转
                                alert('需要180度旋转');
                                rotateImg(this,'right',canvas);//转两次
                                rotateImg(this,'right',canvas);
                                break;
                        }
                    }

                    /*var mpImg = new MegaPixImage(image);
                    mpImg.render(canvas, {
                        maxWidth: 800,
                        maxHeight: 1200,
                        quality: 0.8,
                        orientation: 8
                    });*/
                    base64 = canvas.toDataURL("image/jpeg", 0.8);
                }else if (navigator.userAgent.match(/Android/i)) {
                    // 修复android
                    var encoder = new JPEGEncoder();
                    base64 = encoder.encode(ctx.getImageData(0, 0, expectWidth, expectHeight), 80);
                }else{
                    //alert(Orientation);
                    if(Orientation != "" && Orientation != 1){
                        //alert('旋转处理');
                        switch(Orientation){
                            case 6://需要顺时针（向左）90度旋转
                                alert('需要顺时针（向左）90度旋转');
                                rotateImg(this,'left',canvas);
                                break;
                            case 8://需要逆时针（向右）90度旋转
                                alert('需要顺时针（向右）90度旋转');
                                rotateImg(this,'right',canvas);
                                break;
                            case 3://需要180度旋转
                                alert('需要180度旋转');
                                rotateImg(this,'right',canvas);//转两次
                                rotateImg(this,'right',canvas);
                                break;
                        }
                    }

                    base64 = canvas.toDataURL("image/jpeg", 0.8);
                }
                //uploadImage(base64);
                $("#myImage").attr("src", base64);
            };
        };
        oReader.readAsDataURL(file);
    }
}

//对图片旋转处理 added by lzk www.bcty365.com
function rotateImg(img, direction,canvas) {
        //alert(img);
        //最小与最大旋转方向，图片旋转4次后回到原方向
        var min_step = 0;
        var max_step = 3;
        //var img = document.getElementById(pid);
        if (img == null)return;
        //img的高度和宽度不能在img元素隐藏后获取，否则会出错
        var height = img.height;
        var width = img.width;
        //var step = img.getAttribute('step');
        var step = 2;
        if (step == null) {
            step = min_step;
        }
        if (direction == 'right') {
            step++;
            //旋转到原位置，即超过最大值
            step > max_step && (step = min_step);
        } else {
            step--;
            step < min_step && (step = max_step);
        }
        //img.setAttribute('step', step);
        /*var canvas = document.getElementById('pic_' + pid);
        if (canvas == null) {
            img.style.display = 'none';
            canvas = document.createElement('canvas');
            canvas.setAttribute('id', 'pic_' + pid);
            img.parentNode.appendChild(canvas);
        }  */
        //旋转角度以弧度值为参数
        var degree = step * 90 * Math.PI / 180;
        var ctx = canvas.getContext('2d');
        switch (step) {
            case 0:
                canvas.width = width;
                canvas.height = height;
                ctx.drawImage(img, 0, 0);
                break;
            case 1:
                canvas.width = height;
                canvas.height = width;
                ctx.rotate(degree);
                ctx.drawImage(img, 0, -height);
                break;
            case 2:
                canvas.width = width;
                canvas.height = height;
                ctx.rotate(degree);
                ctx.drawImage(img, -width, -height);
                break;
            case 3:
                canvas.width = height;
                canvas.height = width;
                ctx.rotate(degree);
                ctx.drawImage(img, -width, 0);
                break;
        }
    }
</script>
</html>